Calcium carbonate is a widely used inorganic filler in polymer composite materials. Adding inorganic fillers such as calcium carbonate to rubber and plastic products can improve the heat resistance, wear resistance, dimensional stability, and stiffness of the products, and reduce the cost of the products. However, the hydrophilic and oleophobic surface properties of inorganic fillers make them poorly compatible with polymer materials. Therefore, irregular aggregates are easily formed during processing, resulting in uneven dispersion within the polymer, thus creating interfacial defects and reducing the physical and mechanical properties of the products. In order to overcome the inherent shortcomings of calcium carbonate application and improve its compatibility and dispersibility with polymer materials, so that it becomes a functional reinforcing and toughening filler, research in this area has been very active in recent years [1, 2].

Calcium carbonate is a widely used inorganic filler in high-polymer composite materials. Adding inorganic fillers such as calcium carbonate to rubber and plastic products can improve the heat resistance, wear resistance, dimensional stability, and stiffness of the products, and reduce the cost of the products. However, the hydrophilic and oleophobic surface properties of inorganic fillers result in poor compatibility with high-polymer materials. Therefore, irregular aggregates are easily formed during processing, causing uneven dispersion within the polymer, resulting in interfacial defects and reduced physical and mechanical properties of the products. In order to overcome the inherent shortcomings of calcium carbonate application, improve its compatibility and dispersibility with high-polymer materials, and make it a functional reinforcing and toughening filler, research in this area has been very active in recent years [1, 2].

　　Surface modification methods for calcium carbonate are generally divided into four types: coupling agents, organic surface treatment agents, inorganic treatment agents, and comprehensive surface treatment agents [3]. It is generally believed that the surface modification of fillers by surfactants or organic acids is physical adsorption, which can improve the rheological and processing properties of the materials, but has little effect on the physical and mechanical properties of the products [4]. Modification with coupling agents can not only improve processing performance but also improve the physical and mechanical properties of the products [5].

　　We used JL-G01 modifier to modify ordinary light calcium carbonate. Through physical and chemical actions, the surface of calcium carbonate is organically modified, thus preventing the agglomeration of calcium carbonate particles, and the particles are uniformly distributed in the state of primary particles, some of which are in the state of nanoparticles.